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Greetings, I just tried to pull the data you described from that THREDDS server and I was able to plot accumulated precipitation in GrADS without issue. I'm using version 2.2.1 that comes in apt on Ubuntu 22.04, and I tried to recreate your settings as best I could, as well as a few others just to see if I could break it. Anything I tried seemed to work; see below for my GrADS output. And while I'm not including them here, I was able to visualize that data as well. What version of GrADS are you using? Did you compile this from source or did you install it from a package manager like apt? Would you be able to send me a full URL to a data set that breaks for you so I can try the same thing on my end? My GrADS output: Grid Analysis and Display System (GrADS) Version 2.2.1 Copyright (C) 1988-2018 by George Mason University GrADS comes with ABSOLUTELY NO WARRANTY See file COPYRIGHT for more information Config: v2.2.1 little-endian readline grib2 netcdf hdf4-sds hdf5 opendap-grids,stn geotiff shapefile Issue 'q config' and 'q gxconfig' commands for more detailed configuration information GX Package Initialization: Size = 11 8.5 Running in Batch mode ga-> sdfopen GFS_Global_0p25deg_20230220_1800.grib2.nc4 Scanning self-describing file: GFS_Global_0p25deg_20230220_1800.grib2.nc4 SDF file GFS_Global_0p25deg_20230220_1800.grib2.nc4 is open as file 1 LON set to 105 160 LAT set to -47 -8 LEV set to 0 0 Time values set: 2023:2:20:19 2023:2:20:19 E set to 1 1 ga-> q file File 1 : Descriptor: GFS_Global_0p25deg_20230220_1800.grib2.nc4 Binary: GFS_Global_0p25deg_20230220_1800.grib2.nc4 Type = Gridded Xsize = 221 Ysize = 157 Zsize = 1 Tsize = 46 Esize = 1 Number of Variables = 1 total_precipita 0 t,y,x Total precipitation (Mixed_intervals Accumulation) @ Ground or water surface ga-> q config Config: v2.2.1 little-endian readline grib2 netcdf hdf4-sds hdf5 opendap-grids,stn geotiff shapefile Grid Analysis and Display System (GrADS) Version 2.2.1 Copyright (C) 1988-2018 by George Mason University GrADS comes with ABSOLUTELY NO WARRANTY See file COPYRIGHT for more information This build of GrADS has the following features: -+- Byte order is LITTLE ENDIAN -+- Athena Widget GUI DISABLED -+- Command line editing ENABLED -+- GRIB2 interface ENABLED g2clib-1.6.3 -+- NetCDF interface ENABLED netcdf-4.8.1 -+- OPeNDAP gridded data interface ENABLED -+- OPeNDAP station data interface ENABLED libgadap 2.0 -+- HDF4 interface ENABLED hdf-4.2r15 -+- HDF5 interface ENABLED hdf5-1.10.7 -+- KML contour output ENABLED -+- GeoTIFF and KML/TIFF output ENABLED -+- Shapefile interface ENABLED Best, -Mike > Hi, > > Whenever I try to download subsetted NetCDF files from your NetCDF Subset > Service for Grids webpage (e.g. > https://thredds-jumbo.unidata.ucar.edu/thredds/ncss/grid/grib/NCEP/GFS/Global_0p25deg/GFS_Global_0p25deg_20230220_1800.grib2/dataset.html > ) and open it in GrADS, it always produces the following type of error: > > > > > > *ga-> sdfopen GFS_Global_0p25deg_20230220_1800.grib2.nc > <http://GFS_Global_0p25deg_20230220_1800.grib2.nc>Scanning self-describing > file: GFS_Global_0p25deg_20230220_1800.grib2.nc > <http://GFS_Global_0p25deg_20230220_1800.grib2.nc>Error: nc_open failed to > open file GFS_Global_0p25deg_20230220_1800.grib2.nc > <http://GFS_Global_0p25deg_20230220_1800.grib2.nc>No such file or > directorygadsdf: Couldn't ingest SDF metadata.* > > This happens regardless of what combination of output format (netcdf3 > and netcfd4-classic) and CF compliance settings I use. > > But for some strange reason, I can still open and plot the data in an > application like Panoply. > > Below is a screenshot of how I had the subsetting and output options set up > during one of my attempts at downloading a file with accumulated > precipitation for the Australian area: > > [image: image.png] > I'm just wondering why it's not working? > Ticket Details =================== Ticket ID: ZWT-786400 Department: Support THREDDS Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.